The Hahnel Viper TTL Transmitter Canon is a wireless transmitter for controlling three groups of flashes.

• Compatibility: Canon flashes, MODUS 600RT MK II, and MODUS 360RT
• Flash groups: 3 (A, B, C)
• Wireless range: 100 m
• Radio frequency: 2.4 GHz
• Functions: TTL, manual, stroboscopic
• Synchronization: high-speed and second curtain
• Display: LCD
• Power Supply: 2x AA
• microUSB port: for firmware updates
• 2.5 mm port: for standard flash connections